How and why was the Department of Homeland Security established? What is the organizational structure of DHS? Please try to obtain a minimum of 350 words for the essay. I have included the book information. It would be helpful if that was used as the primary source however you may use other sources as well. Thank you for your time and effort. I have also added screen shots directly from the book to assist. Introduction to Homeland Security: Policy, Organization, and AdministrationWillard M. Oliver, Nancy E. Marion, Joshua B. Hill, 2015Jones and BartlettISBN.13: 978-1-284-04583-3